## anonymous one year ago Express the complex number in trigonometric form. -3i

1. freckles

-3i is the same as 0-3i which is the same as 3(0-1i) so can you find a theta satisfying both of the equations: $\cos(\theta)=0 \\ \sin(\theta)=-1$

2. ganeshie8

|dw:1439675993463:dw|

3. ganeshie8

you may use that(unit circle) to find the $$\theta$$ corresponding to $$(\cos,\sin)= (0,-1)$$